diff --git a/src/domain/session/room/RoomViewModel.js b/src/domain/session/room/RoomViewModel.js
index dfda5767..5ded5108 100644
--- a/src/domain/session/room/RoomViewModel.js
+++ b/src/domain/session/room/RoomViewModel.js
@@ -200,71 +200,72 @@ export class RoomViewModel extends ViewModel {
     async _getMessageInformations (message) {
         let msgtype = "m.text";
         if (message.startsWith("/")) {
-            let command=message.substring(1).split(" ");
-            switch (command[0]) {
+            const [commandName, ...args] = message.substring(1).split(" ");
+            switch (commandName) {
                 case "me":
                    message = message.substring(4).trim();
                    msgtype = "m.emote";
                    break;
                case "join":
-                   if (command.length==2) {
-                       let roomname = message.substring(5).trim();
+                   if (args.length == 1) {
+                       let roomName = args[0];
                        try {
-                           await this._options.client.session.joinRoom(roomname);
+                           await this._options.client.session.joinRoom(roomName);
+                           const internalId = await this._options.client.session.joinRoom(roomName);
+                           this.navigation.push("room", internalId);
                        } catch (exc) {
-                           if (exc.statusCode??exc.status==400) {
-                               this._sendError=new Error("/join : '"+roomname+"' was not legal room ID or room alias");
-                           } else if ((exc.statusCode??exc.status==502) || (exc.message="Internal Server Error")) {
-                               this._sendError=new Error("/join : room not found");
+                           if (exc.statusCode ?? exc.status === 400) {
+                               this._sendError = new Error(`/join : '${roomName}' was not legal room ID or room alias`);
+                           } else if ((exc.statusCode ?? exc.status === 404) || (exc.statusCode ?? exc.status === 502) || (exc.message == "Internal Server Error")) {
+                               this._sendError = new Error(`/join : room '${roomName}' not found`);
                            } else {
-                               this._sendError=new Error("join syntax: /join <room-id>");
+                               this._sendError = new Error("join syntax: /join <room-id>");
                            }
                            this._timelineError = null;
                            this.emitChange("error");
                        }
                    } else {
-                       this._sendError=new Error("join syntax: /join <room-id>");
+                       this._sendError = new Error("join syntax: /join <room-id>");
                        this._timelineError = null;
                        this.emitChange("error");
                    }
-                   msgtype=undefined;
-                   message=undefined;
+                   msgtype = undefined;
+                   message = undefined;
                    break;
                case "shrug":
-                   message="¯\\_(ツ)_/¯ "+message.substring(7);
+                   message = "¯\\_(ツ)_/¯ " + message.substring(7);
                    break;
                case "tableflip":
-                    message="(╯°□°）╯︵ ┻━┻ "+message.substring(11);
+                    message="(╯°□°）╯︵ ┻━┻ " + message.substring(11);
                     break;
                 case "unflip":
-                    message="┬──┬ ノ( ゜-゜ノ) "+message.substring(8);
+                    message="┬──┬ ノ( ゜-゜ノ) " + message.substring(8);
                     break;
                 case "lenny":
-                    message="( ͡° ͜ʖ ͡°) "+message.substring(7);
+                    message="( ͡° ͜ʖ ͡°) " + message.substring(7);
                     break;
                 default:
-                    if (command[0][0]=="/") {
+                    if (commandName[0] == "/") {
                         message = message.substring(1).trim();
                         break;
                     } else {
-                        this._sendError=new Error("no command name '"+command[0]+"'");
+                        this._sendError = new Error(`no command name "${commandName}". To send the message instead of executing, please type "/${message}"`);
                         this._timelineError = null;
                         this.emitChange("error");
-                        msgtype=undefined;
-                        message=undefined;
+                        msgtype = undefined;
+                        message = undefined;
                    }
            }
        }
-       return [msgtype, message];
+       return {type: msgtype, message: message};
    }
     
     async _sendMessage(message, replyingTo) {
         if (!this._room.isArchived && message) {
             let messinfo = await this._getMessageInformations(message);
             try {
-               let msgtype = messinfo[0];
-               let message = messinfo[1];
-               console.log("messinfo :",messinfo);
+               let msgtype = messinfo.type;
+               let message = messinfo.message;
                if (msgtype && message) {
                    if (replyingTo) {
                            await replyingTo.reply(msgtype, message);